detke



A. H. DBIKE.

WEIGHING SCALE.

(NqModeL) No. 392,995. Patented Nov. 20, 1888.

UNITED STATES PATENT AUGUST H. DEIKE, OF GUELPH, ONTARIO, CANADA.

WEIGHiNG-SCALE.

SPECIFICATION forming part of Letters Patent No. 392,995, dated November 20, 1888.

Application filed June 23, 1888.

To all whom it may concern.-

Be it known that I, AUGUST HERMAN EEIKE, cabinet-maker, of the city of Guelph, 1n the county of iVellington, in the Province of Ontario, Canada, have invented a certain new and Improved iVeighingScale, of which the following is a specification.

The object of the invention is to design a simply-constructed scale which will be sensitive in its operation; and it consists of a rolling. trunnion carried on a stationary straight track and having curved wings extending from opposite sides of it, the outer circumference of each wing being equal in diameter and shaped on a true circle which joins the circle of the trunnion, the weight being suspended from the trunnion by a flexible cord, or its equivalent, passing over one of the curved wings, and the weighing-tray similarly suspended from the trunnion by a flexible cord, or its equivalent, carried over the other curved wing. An index-finger connected to the center of the trunnion and operating in conjunction with a properly-marked indexplate completes the essential portions of my scale.

The drawing shows a perspective elevation of my improved scale.

A represents a straight track supported on a light and gracefully-constructed frame, I.

O is a trunnion which rests on the track A, and is preferably grooved to fit onto the said track.

1) is a curved wing extending from the trunnion G, the outer circumference of the wing D being shaped on a true circle which joins the circle of the trunnion, as indicated. E is a similar curved wing extending from the op positc side of the trunnion G and equal in diameter to the wing D.

F is a piece of wire or other flexible mate rial attached at one end to the trunnion O. This wire is carried loosely over the wing D, and has connected to its other end a weight, G.

H is a piece of wire or other flexible mate rial similar to the wire F and connected to the trunnion G. This wire II is carried loosely over the wing E and has the weighing-tray I connected to it, as indicated. The wings D and E are preferably grooved to receive their respective wires F and H. The weight G should be made sufficiently heavy to counter- Serial No. 278,025. (Xe model.)

balance the weighing-tray I and hold the point 011 the circumference of the wing D farthest from the center of the trunnion substantially level with a horizontal line drawn through the center of the trunnion O.

In order to hold the trunnion (l in its place on the track A, and to do so without interfering with the free rolling movement of the said trunnion, I wrap round each end of the trun nion C a cord or other flexible material, J, and connect the ends of each cord J to a winding-key, K, situated at each end of the track A, as indicated. By winding the cords J on the keys at at one end of the track and unwinding the said cords situated at the other end of the track the position of the trunnion 0 may be readily adjusted.

Lis an index-finger connected to the cent-er of the trunnion G and extending across the face of the scale-plate M, which is properly marked to indicate the weight which may be placed on the tray I.

It will of course beunderstoed that I do not confine myself to the tray 1, as any device by which the article to be weighed can be supported from the wing E will answer, and I wish any such device to be considered an equivalent for the tray.

'When the article to be weighed is placed on the tray I, the wing E will be drawn down, and the wing D, from which the weight is is suspended, will move up, and consequently, owing to the positions of the wings relatively to the trunnion O, the point from which the tray I is suspended will move nearer to the center of the trunnion C as the wing E is drawn down, while the point on the wing 1) from which the weight (w is suspended will move farther from the center of the trunnion O, and thus the power of the weight is increased in proportion to me weight of the article being weighed.

the scale-plate is properly marked to indicate the exact weight placed on the tray.

hat I claim as my invention is- 1. A weighingscule comprising a stationary straight track, a trunnion rolling on said track and having curved wings extending from its opposite sides, the outer circumference of each wing being equal in diameter and shaped on a true circle joining the circle of the trunnion, flexible cords suspended from ameter and shaped on a true circle joining the circle of the trunnion, flexible cords carried by said wings, a weight and a weighingtray suspended by said cords, an index-finger connected to the trunnion, and a properlymarked scale-plate, substantially as and for the purpose specified.

Toronto, April 27, 1888.

AUGUST H. DEIKE.

In presence of CHARLES C. BALDWIN, CHAS. H. Rionns. 

